Pulley structure for trench-filling machines



June 30, 1925. 1543.922

v w. G. HUMPHREYS ET AL PULLEY STRUCTURE FOR TRENCH FILLING MACHINES Filed Nov, 5, 1924 2 Sheets-Sheet 1 W. G. HUMPHREYS ET AL PULLEY STRUCTURE FOR TRENCH FILLING MACHINES June 30, 1925 5. 1924 2 Sheets-Sheet 2 Rama,

Patented June 33, 1925,

UNITED STATES.

PATENT OFFICE.

PULLEY STRUCTURE FOR TREN'CH-FILLING MACHTNES.

Application filed November 3, 1924. Serial No. 747,611.

To all whom it may concern:

Be it known that we, VALTER G. HUM- rnnnrs and'OMAn R. HUMrr-rnnrs, citizens of the United States, residing at' Omaha,

in the county of Douglas and State of Nebraska, have invented certain new anduseful Improvements in PulleyStructures for Trench-Filling Machines, of whichthe following is a specification. The present invention relates to trench filling machines and has more particular reference to a pulley structure and mounting thereof for facilitatingthe operation of the machine. a d

An object of the invention is to provide a pulley which is counterweighted and pivoted so that it may follow the direction of'pull upon the cable which is trained over the pulley and thus offer the least resistance to action during the operation of the machine, and to also maintain the cablefrom draw- 1 ing over the top of the pulley.

Another object of the invention is to provide animproved mounting for the counterweighted pulley on the end of a boom'so that the boom may be swung transverselyof the machine and may also be raised and lowered and at the same time maintain the pulley in proper working position during these adjustments of the boom.

With the foregoing and other objects in view, the invention will be more fully described hereinafter, and will be more particularly-pointed out in the claims appended hereto. e

In the drawings, wherein like symbols refer to like or corresponding parts throughout the several views,

Figure 1 is a side elevation of the forward portion of a trench filling machine having the devices of this invention appled thereto.

Figure 2 is a top plan view of the same;

Figure 3 is a fragmentary front elevation of the machine showing a scraper or shovel connected to the parts, and

Figure 1- is an enlarged detail sectional view taken longitudinally through one of the counterweighted pulleys on its pivotal support.

Referring to the drawings 10 designates the work frame of a trench filling machine which may be of any suitable construction and which is provided with an upright 11 provided at its top with a pulley 12.

The frame 10 carries a boom 13 which is pivoted upon the upper end of a bearing carried on a large gear wheel 15 arranged horizontally in the frame 10 and operated in any suitable manner as by a worm 16 on a shaft 17. The frame may be supported upon wheels 18 and it is provided at its forward end with a cross piece 19 to which is :se cured an out rigger2O the latter projecting from one forward corner of the frame as shown to'advantage in Figure 2.

The out rigger 20 is provided with a pivot bracket 21 upon its outer extremity and the bracket forms an elongation of the out rigger and is arranged to support a pulley frame 22 forked at one end andin which is mounted a pulley 23 while the other end 24 of the frame 22 provides a weight arm which may be constructed of suitable thick ness to provide the necessary counterweight for the pulley 23 and the parts bearing on the same, or which 'may be weighted'in any other suitable manner.

The boom 13 has an outer end portion 25 forming an extension for the boom and the latter may be projected to various extents and secured in adjusted position by a pin 26 adapted to engage in openings 27 formed in the extension 25 and the boom 13 and adapt ed to register at various adjustments of the extension 25.

The outer end of the extension 25 is provided with a laterally extending head 28 which is connected in any suitable manner to the extension 25 and which forms a link 7 or connecting portion between the outer end of the boom and an adjusting cable 29 which is connected to the link 28 and is carried backwardly and trained over the pulley 12 at the top of the post or standard 11. It will be noted from Figures 1, 2 and 3 that this head 28 extends not only upwardly and rearwardly from the end of the boom 13 but that it also is inclined laterally therefrom so as to dispose the cable 29 in such position that it may exert a direct pull upon the outer end of the boom irrespective of the transverse location of the outer end of the same.

The head 28 is provided with an outstanding pin 30 forming a pivot for a second counterweighted pulley frame 22 in which is disposed a second pulley 23 and which has the weight arm 24 as above described. The pin 30 is off set from the axisof the extension 25 of the boom and in such position that the pulley 23 may clear the end of the boom. and permit of the vertical and transverse adjustment of the head 28 t A shovel 31, scoop or other suitable device is connected at one end to one end of'a cable" and] forth across the front of the work,

frame-10, The other end of the shovel 31 is connected to another cable 33 which is trained over the pulley 32 carried upon the outrigger 20 and the cable 33 may be passed over guide .pulleys 34: which are mounted upon the forward end of the frame 10 and operated by any suitable mechanism for drawing in and paying out the cable 33 or alternate operation for moving the shovel 31 back and forth. 7

As the pulley frames 22 have the counterweights24 the pulleysare held in line with their respective cables 32 and 33 by the draft onthe cables as but a slight drag upon the pulleys is sufficient to swing the frames 22 into line with thecables and to cause the pulleys to swing with the cables in other various positions incident to the rise and vertical adjustments of the boom butralso' fall of: the boom 13 and the positionlof the shovel 31.

As the head 28 on the outer end-of the boom 13 carriesthe pin 30 in an offset position, the pulley23 is held at one side of the boom and above the end thereof so that the cable 32 at all times clears the head'28 and the adjacent parts whether the boom is raised or lowered.

The provision of the head 28 and the counterweighted pulleys on the head and on the out rigger 20 permits of not only the its extension and its swinging transversely of the frameso that the shovel 31 may be operated back and forth through various distances and at desired angles in front of the work frame 10.

I do not wish to be restricted to the size,

form, and proportions of the various parts, and obviously changes could be made in the construction herein described without departing fromthe spirit of the invention, it being only necessary that suc'hchanges fall within the scope of the appended claims.

What is claimed is 1, In a trench, filling machine having an out rigger, a boom, a shovel, and cables connected to the oppositeends of the shovel,a counterweighted pulley on the outer end of the outrigger for receiving one of. said cables thereover, a head on the outer end of i the boom having an offset pin thereon, and a second counterweighted pulley pivotally mounted on said pin and adapted to receive the other cable thereover. i

2. In a trench filling machine, provided with a'boom and a cable adapted to besupported on the outer end of the boom a head carried by said boom and extending upwardly and laterally from the outer endof the boom, an outwardly projecting pin mounted on the head inv offsetrelation to the boom and a counterweighted pulley mounted on said pin adapted to swing in front ofsaid head andadapted to receive said cable thereover.

'3. In a trench filling machine having a stationary outrigger, an adjustable boom, a shovel, and cables connected to opposite ends of the shovel and adapted to be supported uponthe outer ends of the out rigger and the boom, a pivot pin projecting from the end of the out rigger, an offset head mounted on the outer end of the boom, pin projecting outwardly from the head in ofli'set relation to the boom, and counterweighted pulleys pivotally mounted on said pins adapted toreceive said cables thereover. In testimony whereof, we have affixed our signatures in presence of two witnesses.

WALTER G. HUMPHREYS. OMAR n. HUMPHREYS,

Witnesses:

F. R. GILES, HIRAM A. S nners. 

